PM41028B-F3EI

Overview

The PM41028B-F3EI is a Switchtec PSX Gen4 Programmable PCIe switch supporting 28 lanes and 16 ports. It provides up to 14 Non-Transparent Bridges (NTBs) and 8 virtual switch partitions. The device features hot-plug controllers for each port, advanced error containment mechanisms including AER and DPC, and an integrated MIPS processor for enclosure management. It supports PCIe Gen4 16 GT/s speeds, NVMe-MI in-band and MCTP out-of-band management, and includes multiple I/O interfaces such as TWI, UART, and Ethernet MAC.

Feature Summary

• Integrated high-performance DMA controller with ultra-low latency
• Advanced error containment with upstream error prevention and completion timeout synthesis
• Comprehensive diagnostics featuring real-time eye capture and external loopback
• Flexible port bifurcation supporting x1, x2, x4, x8, and x16 configurations

Applications

• PCIe SSD enclosures
• Flash arrays
• Multi-host architectures
• High-density servers
• Blade servers

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature range. Ensure compatibility with the Switchtec PSX Software Development Kit for firmware integration. Confirm that the selected variant meets the required lane count and partition limits for the target system design.

Selection Notes

Select this model when 28 lanes and 16 ports are sufficient for the topology. Consider higher-lane variants like the PM41052 or PM41100 if more ports or NTBs are needed. Evaluate the need for virtual switch partitions and NTB assignments to ensure the 8-partition limit accommodates the system architecture requirements.

Part Context

This component belongs to the Switchtec PSX Gen4 Programmable PCIe Switch Family, which includes variants ranging from 28 to 100 lanes. The family is designed for high-reliability applications requiring extensive I/O interfaces and robust error handling capabilities within data center environments.

Replacement Considerations

Direct replacements within the same family include the PM41036B-F3EI and PM41052B-F3EI, offering different lane counts. Verify pinout and software compatibility before substituting.